The adhesion of plastic to metal surfaces is improved by adding a specific filler in the sheathing material. The filler is formed of spherical SiO2 particles with a graduated diameter distribution defining individual diameter stages wherein the standard deviation in mean particle diameter of at least one diameter stage of said SiO2 particles is less than 10%. Spherical SiO2 particles with a graduated diameter distribution defining individual diameter stages are also mixed together in such ratio to obtain packing densities of 90% or more. Said spherical SiO2 particles with a graduated diameter distribution defining individual diameter stages may also be characterized as having an index of refraction which increases from the center of a particle to the surface.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A plastic composition for sheathing a metal and/or semiconductor body, comprising: at least one polymer and at least one filler; said filler having spherical SiO 2 particles with a graduated diameter distribution defining individual diameter stages containing more than two diameter stages including a primary stage, and wherein a standard deviation in a mean diameter of said SiO 2 particles of at least the primary diameter stage is less than 10%.
2. The plastic composition according to claim 1 , wherein the standard deviation in the mean diameter of the SiO 2 particles of at least the primary diameter stage is less than 5%.
3. The plastic composition according to claim 2 , wherein the standard deviation in the mean diameter of the SiO 2 particles of at least the primary diameter stage is less than 1.7%.
4. A plastic composition for sheathing a metal and/or semiconductor body, comprising: at least one polymer and at least one filler; said filler having spherical SiO 2 particles with a graduated diameter distribution defining individual diameter stages, and wherein a quantity of SiO 2 particles of at least one diameter stage and the mean diameters of the individual diameter stages are selected such that a packing density of the SiO 2 particles of at least 90% results.
5. The plastic composition according to claim 4 , wherein said quantity of SiO 2 particles of one diameter stage and the mean diameters of the individual diameter stages are selected such that a packing density of the SiO 2 particles of at least 95% results.
6. A plastic composite body, comprising: a base body of a material selected from the group consisting of metal and semiconductor material; and a sheath of said base body, said sheath being formed of a polymer and at least one filler; said filler having spherical SiO 2 particles with a graduated diameter distribution defining individual diameter stages containing more than two diameter stages including a primary stage, and wherein a standard deviation in a mean diameter of said SiO 2 particles of at least the primary diameter stage is less than 10%.
7. The plastic composite body according to claim 6 , wherein the standard deviation in the mean diameter of the SiO 2 particles of at least the primary diameter stage is less than 5%.
8. The plastic composite body according to claim 6 , wherein the standard deviation in the mean diameter of the SiO 2 particles of at least the primary diameter stage is less than 1.7%.
9. The plastic composite body according to claim 6 , wherein said surface of said SiO 2 particles has an at least partial modification with trialkoxysilanes.
10. The plastic composite body according to claim 9 , wherein said trialkoxysilanes are selected from the group consisting of methyltriethoxysilane, ethyltriethoxysilane, hexyltri-ethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyl-triethoxysilane, and 3-mercaptopropyltriethoxysilane.
11. A plastic composite body comprising: a base body of a material selected from the group consisting of metal and semiconductor material; and a sheath of said base body, said sheath being formed of a polymer and at least one filler; said filler having spherical SiO 2 particles with a graduated diameter distribution defining individual diameter stages, and a quantity of SiO 2 particles of at least one diameter stage and the mean diameters of the individual diameter stages are selected such that a packing density of the SiO 2 particles of at least 90% results.
12. The plastic composite body according to claim 11 , wherein said quantity of SiO 2 particles of at least one diameter stage and the mean diameters of the individual diameter stages are selected such that a packing density of the SiO 2 particles of at least 95% results.
13. A plastic composite body comprising: a base body of a material selected from the group consisting of metal and semiconductor material; and a sheath of said base body, said sheath being formed of a polymer and at least one filler; said filler having spherical SiO 2 particles with a graduated diameter distribution defining individual diameter stages, and an interior with a center and a surface, and wherein an index of refraction in the interior of at least one of said SiO 2 particles increases from said center to said surface.
14. A filler material for a plastic composition, comprising: spherical SiO 2 particles with a graduated diameter distribution defining distinct diameter stages containing more than two diameter stages including a primary stage, wherein a standard deviation in a mean diameter of said spherical SiO 2 particles of at least the primary diameter stage is less than 10%.
15. The filler material according to claim 14 , wherein the standard deviation in the mean diameter of the SiO 2 particles of the at least the primary diameter stage is less than 5%.
16. The filler material according to claim 14 , wherein the standard deviation in the mean diameter of the SiO 2 particles of the at least the primary diameter stage is less than 1.7%.
17. The filler material according to claim 14 , wherein said surface of said SiO 2 particles has an at least partial modification with trialkoxysilanes.
18. The filler material according to claim 17 , wherein said trialkoxysilanes are selected from the group consisting of methyltriethoxysilane, ethyltriethoxysilane, hexyltriethoxy-silane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltriethoxysilane, and 3-mercaptopropyltriethoxysilane.
19. The filler material for a plastic composition, comprising: spherical SiO 2 particles with a graduated diameter distribution defining distinct diameter stages wherein a quantity of SiO 2 particles of at least one diameter stage and the mean diameters of the individual diameter stages are selected such that a packing density of the SiO 2 particles of at least 90% results.
20. The filler material according to claim 19 , wherein said quantity of SiO 2 particles of at least one diameter stage and the mean diameters of the individual diameter stages are selected such that a packing density of the SiO 2 particles of at least 95% results.
21. A filler material for a plastic composition, comprising: spherical SiO 2 particles with a graduated diameter distribution defining distinct diameter stages, said spherical SiO 2 particles each has an interior with a center and a surface, and wherein an index of refraction in the interior of at least one of said SiO 2 particles increases from said center to said surface.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
November 20, 1998
April 2, 2002
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